Below you can see the front view size comparison of Panasonic GH5S and Sony A7S II. Sony A7S II is clearly the smaller of the two cameras. Its body is 12mm narrower, 2mm shorter and 27mm thinner than Panasonic GH5S.

Now lets look at the top view comparison of Panasonic GH5S and Sony A7S II.

Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Sony A7S II is 33g lighter than the Panasonic GH5S but we don't think this will make a significant difference.

Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you have to also take into account the lenses that you will be using with these bodies. Since Sony A7S II has a Full frame sensor and Panasonic GH5S has a smaller Four Thirds sensor, Panasonic GH5S's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A7S II lenses.

Another difference between these two cameras is that Panasonic GH5S's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moire occurring in certain scenes.

Below you can see the GH5S and A7S II sensor size comparison.

As seen above, Sony A7S II has a 3.8x Larger sensor area than Panasonic GH5S. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.

What types of Photography are Panasonic GH5S and Sony A7S II Good for?

In this section, we rank and compare Panasonic GH5S and Sony A7S II for five different photography types in order to make your decision process easier in case you are specifically interested in one or more of these areas.

Number of available lenses is a big decision factor while choosing your interchangeable lens camera. When we look at the available lenses for these two cameras, we see that Panasonic GH5S has an advantage over Sony A7S II. There are 90 lenses for Panasonic GH5S's Micro Four Thirds mount, on the other hand there are only 73 lenses for Sony A7S II's Sony E (NEX) lens mount.

Another important factor is the availability of image stabilization. Sony A7S II has a big advantage in this regard because it has a sensor based image stabilization which means that all the lenses mounted to this body will be stabilized. On the other hand, Panasonic GH5S doesn't have this feature so you have to buy a lens with optical stabilization feature. Currently there are 22 lenses for Micro Four Thirds mount with Optical Image Stabilization features.

You may have already made your decision about which camera suits better for your needs and your budget so far but in case you wonder how we rated Panasonic GH5S and Sony A7S II, below you can find their scores in five different aspects.
Our Decision Algorithm dynamically scores cameras using 63 different specs, current price and DxO Mark scores (where possible) in order to make a more objective and consistent comparison.

Here is a summary of how Panasonic GH5S and Sony A7S II scores compare:

Panasonic GH5S

Imaging

Features

Value

Portability

Overall

Ranked #28 out of 49 in SLR-style mirrorless camerasRanked #99 out of 1131 in all Cameras

Sony A7S II

Imaging

Features

Value

Portability

Overall

Ranked #7 out of 49 in SLR-style mirrorless camerasRanked #16 out of 1131 in all Cameras

Sony A7S II is the clear winner of this comparison. It has a higher Overall Score and beats Panasonic GH5S in all criterias. It has better general image quality, more features, more compact body and offers more value for the money